Datasheet > SPX2945U-L-3.3

SPX2945U-L-3.3

更新时间： 2024-11-26 07:07:59

品牌	Logo	应用领域
西伯斯 - SIPEX		/
页数	文件大小	规格书
11页	241K
描述
Fixed Positive LDO Regulator, 3.3V, 0.7V Dropout, PSFM3, LEAD FREE, TO-220AB, 3 PIN

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中文翻译

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数据手册

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SPX2945U-L-3.3 数据手册

SPX2945

400mA Low Dropout Voltage Regulator with Shutdown

FEATURES

1.2V to 20V

+V_IN

V_OUT

■ Output 3.3V, 5.0V at 400mA Output

■ Very Low Quiescent Current, 100µA

■ Low Dropout Voltage, 420mV at 400mA

■ Extremely Tight Load and Line Regulation

■ Very Low Temperature Coefficient

■ Current & Thermal Limiting

100K

OFF

0.01µF

10µF

R₁

SPX2945

______

ERROR

SHUTDOWN

INPUT

ERROR

OUTPUT

GND

V_REF

R₂

Adjustable Regulator

■ Error Flag Warns Of Output Dropout

■ Logic-Controlled Electronic Shutdown

V_IN

OUT

SPX2945

■ Output Programmable From 1.24V to 20V

(for SO-8)

2.2 µF

GND

0.1 µF

5V Regulator Circuit

Now Available in Lead Free Packaging

DESCRIPTION

TheSPX2945isalowpowervoltageregulator.Thisdeviceisanexcellentchoiceforuseinbattery-powered

applications such as cordless telephones, radio control systems, and portable computers. The SPX2945

features very low quiescent current (100µA Typ.) and very low dropout voltage. This includes a tight initial

tolerance of 1% max and very low output temperature coefficient, making the SPX2945 useful as a low-

power voltage reference.

The error flag output feature is used as power-on reset for warning of a low output voltage, due to a falling

voltage input of batteries. Another feature is the logic-compatible shutdown input which enables the

regulator to be switched on and off. The SPX2945 is offered in 3-pin TO-220 package, SO-8 (same pin

out as SPX2951), SOT-223, surface mount 3-Pin TO-252, 3-Pin TO-263 packages and 5-Pin TO-263.

The regulator output voltage (of the 8-pin SO-8) may be pin-strapped for a 3.3V and 5.0V or programmed

from1.24Vto20Vwithanexternalpairofresistors. LookforSPX2951for150mAandSPX2954for250mA

applications.

TO-252 (R)

TO-263-5 (T5)

8-Pin Surface Mount

SOT-223 (M3)

(S)

TO-220-3 (U)

TO-263-3 (T)

V_OU

V_IN

SPX2945

5 Pin TO-263

SPX2945

SENS

SHUTDOWN

FEEDBACK

5V/ 3.3V TAP

ERRO

SPX2945

2 3 4 5

V_IN

V_OU

V_INGN V_OU

V_INGN

V_OU

V_INGN V_OU

Date: 09/14/04

SPX2945 400mA Low Dropout Voltage Regulator with Shutdown

12 3 4 5 6 7...11

中文翻译

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与SPX2945U-L-3.3相关器件

型号	品牌	获取价格	描述	数据表
SPX2945U-L-5.0	SIPEX	获取价格	Fixed Positive LDO Regulator, 5V, 0.7V Dropout, PSFM3, LEAD FREE, TO-220AB, 3 PIN
SPX2945U-L-5.0	ROCHESTER	获取价格	5V FIXED POSITIVE LDO REGULATOR, 0.7V DROPOUT, PSFM3, LEAD FREE, TO-220AB, 3 PIN
SPX2945U-L-5-0	SIPEX	获取价格	Regulator,
SPX2946S-3.3	SIPEX	获取价格	500mA Low Drop Out Voltage Regulator with Shutdown
SPX2946S-5.0	SIPEX	获取价格	500mA Low Drop Out Voltage Regulator with Shutdown
SPX2946T3-3.3	SIPEX	获取价格	500mA Low Drop Out Voltage Regulator with Shutdown
SPX2946T3-5.0	SIPEX	获取价格	500mA Low Drop Out Voltage Regulator with Shutdown
SPX2946T5-3.3	SIPEX	获取价格	500mA Low Drop Out Voltage Regulator with Shutdown
SPX2946T5-5.0	SIPEX	获取价格	500mA Low Drop Out Voltage Regulator with Shutdown
SPX2946U3-3.3	SIPEX	获取价格	500mA Low Drop Out Voltage Regulator with Shutdown

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